<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%=request.getAttribute("errorId") %>
<br/>
由于是forword,所以可以访问到request中的参数<%=request.getParameter("id") %>
<br/>
<%=request.getAttribute("requestError") %>
<%=session.getAttribute("sessionError") %>
</body>
</html>